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[{"$nulls":30},"51350 Security Grilles"]
[{"$nulls":10},"Input Data",{"$nulls":12},"Nominal Duct","Core Area","H & W",null,null," "," "]
[null,"Enter Duct Width in inches =",{"$nulls":8},12,"Inches",{"$nulls":11},"Area '( ft2 )","( ft2 )","border",null,null," Free area & Core Area Ratio",null,"Ak/Ac",0.975,"Ak Consts.",null," - ","\""," "," "]
[null,"Enter Duct Height in inches =",{"$nulls":8},14,"Inches",{"$nulls":11},1.1666666666666667,1.00927734375,0.75,{"$nulls":4},"Eff. Ak",0.663,"M",0.68]
[null,"Enter Minimum Neck Velocity (greater than 0)=",{"$nulls":8},200,"FPM",{"$nulls":20},"B",0]
[null,"Enter Maximum Neck Velocity =",{"$nulls":8},800,"FPM",{"$nulls":16},"Throw Zones",{"$nulls":6},"Ac*Eff Ak = "]
[{"$nulls":29},"c(ii)","c(iii)","c(iv)",null,null,null,0.66915087890625]
[{"$nulls":28}," ",1.8,5.5,13,null,null,null,"for 51350, use Eff. Ak only"]
[null,"51350 Minimum Security Supply Grille"]
[null,"IP Data",{"$nulls":5},"Metric Data",{"$nulls":27},"Band","Slope 1","Slope 2","Const"]
[null,"Nom","Duct","Neck","Air","Entrained",null,"Nom","Duct","Neck","Air","Entrained",null,null,"Estimated",{"$nulls":20},2]
[null,"Duct","Area","Vel","Flow","Pt","Throw","Duct","Area","Vel","Flow","Pt","Throw","NC","Octave Band, dB",{"$nulls":20},3]
[null,"in","ft²","FPM","CFM","\"WG","ft","mm","m²","m/s","L/s","Pa","m",null,2,3,4,5,6,7,{"$nulls":8},"Pressure Constants",null,null,null," ",null,null,4]
[null,null,null,200,233.33333333333334,0.017082267639857165,"8 - 16 - 28",null,null,1.016,110.12106000000001,4.253484642324434,"2.4 - 4.8 - 8.5"," - ","*","*",14.723557176704777,11.723557176704777," - ","*",{"$nulls":9},"m","b",null,null," ",null,5]
[null,null,null,275,320.83333333333337,0.03229616225660496,"14 - 22 - 33",null,null,1.397,151.41645750000004,8.041744401894636,"4.4 - 6.6 - 10.0",10.57492985934677,"*","*",23.57492985934677,20.57492985934677," - ","*",{"$nulls":8},"0 Degrees",0,6.85,{"$nulls":4},6]
[null,null,null,350,408.33333333333337,0.052314444647062586,"18 - 26 - 37",null,null,1.778,192.711855,13.026296717118584,"5.6 - 8.0 - 11.3",17.27799229262762,"*","*",30.27799229262762,27.27799229262762,12.27799229262762,"*",{"$nulls":15},7]
[null,"12\"",null,425,495.83333333333337,0.07713711481123002,"22 - 29 - 41",304.79999999999995,null,2.1590000000000003,234.00725250000002,19.207141587996276,"6.8 - 8.8 - 12.4",22.67452897742992,"*","*",35.674528977429915,32.674528977429915,17.67452897742992,"*"]
[null,"x",1.1666666666666667,500,583.3333333333334,0.1067641727491073,"26 - 31 - 44","x",0.10838688000000002,2.54,275.30265,26.584279014527716,"7.8 - 9.5 - 13.5",27.191717731715176,"*","*",40.19171773171517,37.19171773171517,22.191717731715176,"*",{"$nulls":14}," "]
[null,"14\"",null,575,670.8333333333334,0.1411956184606944,"27 - 34 - 48",355.59999999999997,null,2.9210000000000003,316.5980475,35.157708996712906,"8.4 - 10.2 - 14.5",31.076379514346332,"*","*",44.07637951434633,41.07637951434633,26.076379514346332,"*",{"$nulls":8},"Sound",{"$nulls":6},"2","3","4","5","6","7","NC"]
[null,null,null,650,758.3333333333334,0.18043145194599136,"29 - 36 - 51",null,null,3.302,357.89344500000004,44.92743153455185,"8.9 - 10.9 - 15.4",34.48409227935274,"*","*",47.48409227935274,44.48409227935274,29.48409227935274,"*",{"$nulls":10},"B","CVn","CAn",null,"M(An)"]
[null,null,null,725,845.8333333333334,0.2244716732049981,"31 - 38 - 53",null,null,3.6830000000000003,399.1888425,55.89344662804453,"9.4 - 11.5 - 16.3",37.51926987475356,"*","*",50.51926987475356,47.51926987475356,32.51926987475356,"*",{"$nulls":8},"0 deg",null,-148,64,9,null,"M(Vn)"]
[null,null,null,800,933.3333333333334,0.27331628223771465,"32 - 40 - 56",null,null,4.064,440.48424000000006,68.05575427719094,"9.9 - 12.1 - 17.1",40.25539662169437,"*","*",53.25539662169437,50.25539662169437,35.25539662169437,"*",{"$nulls":9},"Teams",-148,null,null,null,"B"]
[{"$nulls":28},"Use core area and velocity for sound on this unit."]
[]
[null,"1)  Throw values are given for terminal velocities of 150, 100, and 50 fpm (0.75,0.5 and 0.25 m/s), Isothermal Conditions"]
[null,"2) Dash (-) in space denotes an NC or dB value of less than 10."]
[null,"3) Data were obtained from test conducted in accordance with ANSI / ASHRAE Standard 70-1991."]
[null,"4) Octave Band data was estimated using the guidelines stated in the Engineering Section of Krueger's Catalog."]
[null,"5) NC assumes a room absorption of 10dB."]
[{"$nulls":41}," "]